4i42

E.coli. 1,4-dihydroxy-2-naphthoyl coenzyme A synthase (ecMenB) in complex with 1-hydroxy-2-naphthoyl-CoA

spinqualitylabelsall models 4i42, resolution 1.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4i42 is a 12 chain structure with sequence from Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.848Å Ligands: 1HA, BCT, BTB, CL, EDO, GOL, PEG, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MENB_ECOLI Converts o-succinylbenzoyl-CoA (OSB-CoA) to 1,4-dihydroxy-2-naphthoyl-CoA (DHNA-CoA). Publication Abstract from PubMed 1, 4-Dihydroxy-2-naphthoyl coenzyme A (DHNA-CoA) synthase is a typical crotonase fold enzyme with an implicated role of conformational changes in catalysis. We have identified these conformational changes by determining the structures of its Escherichia coli and Synechocystis sp. PCC6803 orthologues in complex with a product analog. The structural changes include the folding of an active-site loop into a beta-hairpin and significant reorientation of a helix at the carboxy terminus. Interestingly, a new interface is formed between the ordered loop and the reoriented helix, both of which also form additional interactions with the coenzyme A moiety of the ligand. Site-directed mutation of the amino acid residues involved in these ligand-induced interactions significantly diminishes the enzyme activity. These results suggest a catalytically essential induced-fit that is likely initiated by the enzyme-ligand interactions at the active site. Structural basis of the induced-fit mechanism of 1,4-dihydroxy-2-naphthoyl coenzyme a synthase from the crotonase fold superfamily.,Sun Y, Song H, Li J, Li Y, Jiang M, Zhou J, Guo Z PLoS One. 2013 Apr 26;8(4):e63095. doi: 10.1371/journal.pone.0063095. Print 2013. PMID:23658663 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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